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High Lights- 1

AMI and Snapshot Behavior​

  • When the new AMI is copied from Region A into Region B, it automatically creates a snapshot in Region B because AMIs are based on the underlying snapshots.

Messaging & Streaming​

  • By default, FIFO queues support up to 300 messages/second (send, receive, or delete ops).
  • Amazon Kinesis Data Firehose is a fully managed service for real-time streaming delivery to:
    • Amazon S3, Redshift, OpenSearch, Splunk, or custom endpoints.
    • Supported providers: Datadog, Dynatrace, LogicMonitor, MongoDB, New Relic, Sumo Logic.
    • But Firehose cannot directly write into a DynamoDB table.

Storage Services​

  • Amazon FSx for Lustre is a high-performance file system used in:
    • Machine learning, HPC, video processing, financial modeling.
  • AWS Storage Gateway offers:
    • File Gateway: SMB/NFS access with caching.
    • Volume Gateway: iSCSI block storage for on-prem apps.
    • Tape Gateway: move tape backups to the cloud.
  • Instance store is ideal for temporary storage (buffers, caches, scratch data).
  • S3: No data transfer charges for internet uploads.

Databases​

  • Amazon RDS Custom for Oracle:
    • Enables custom patches, host-level config, and privileged access for third-party integrations.
  • Amazon Aurora read replicas:
    • Prioritized with tiers (0–15).
    • During failover, lowest tier gets promoted; if tied, largest replica is promoted.
  • Babelfish allows Aurora PostgreSQL to understand T-SQL and SQL Server wire protocol for easier migration.

Networking & Acceleration​

  • Georestriction (geo-blocking): Prevent access by location in CloudFront.
  • AWS Global Accelerator:
    • Provides static IPs for multi-region app entry points (ALB, NLB, EC2).
    • Not effective for accelerating file uploads to S3.
    • Ideal for non-HTTP use cases like:
      • Gaming (UDP), IoT (MQTT), VoIP, and HTTP use cases requiring static IPs or fast failover.
  • A gateway endpoint is added to route tables for AWS services like:
    • Amazon S3
    • DynamoDB

Monitoring & Metrics​

  • In CloudWatch, the following metrics are not readily available:
    • Memory utilization
    • Disk swap
    • Disk space
    • Page file
    • Log collection

Security & Data Movement​

  • Amazon GuardDuty analyzes billions of events across:
    • CloudTrail, VPC Flow Logs, and DNS logs.
  • Each Snowball Edge Storage Optimized device handles up to 80 TB of data.

Compute Limits​

  • AWS Lambda supports 1000 concurrent executions per AWS account per region.
    • Be aware of this if SNS triggers lead to excessive Lambda usage.

Content Behavior in CloudFront​

  • CloudFront:
    • Dynamic content (when all headers forwarded) bypasses regional edge caches and goes directly to the origin.

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